H3C XE 200/2000 IP, Operation Manual

Page: 237 / 514

Operation Manual – Feature
H3C XE 200/2000 IP PBX
Chapter 2 Backup and Load Sharing
2-11
3) Identify the gateways in each PS group. For example, 20 gateways, W1 through
W20, are found in PS group g1.
4) Sum up the user-defined relative capabilities of all PSs in the group with the
following formula:
∑
=
np
i
CVi
1
= CV
∑
=
np
i
CVi
1
= CV
Where, i is the subscript for the PSs, CV
i
is the relative capability that you have set
for PS i , and CV is the sum.
5) Sum up the subscriber lines accommodated by all gateways in this group with the
following formula:
∑
=
nw
j
SVj
1
SV
=
∑
=
nw
j
SVj
1
SV
=
Where, j is the subscript for gateways, SV
j
is the number of subscriber lines of the
gateway j , and SV is the sum.
6) Compute the number of subscriber lines that each PS can accommodate with the
following formula:
∑
∑
=
=
=
np
i
nw
j
CVi
CVi SVj
DSVi
1
1
* ) (
Where, i is the subscript for the PSs.
7) If a PS is overloaded, one or more appropriate gateways are redirected to other
PSs with lighter load in the same group for registration.
Thus, a new balance is achieved.
2.2.4 Configuring Load Sharing
I. Enabling/disabling the load sharing capability of a gateway
You can enable or disable load sharing capability specific to a gateway depending on
the support of the gateway to the load sharing function of the XE 200/2000 and the
actual needs.